Kea implementation

[jaltman]

@jimp I appreciate that ISC DHCP Server has reached EOL and as a result they do not expect to release any additional updates. I also understand from their announcement that ISC recommends that new users consider Kea DHCP over ISC DHCP.
My concern is that in the context of pfSense the integration of Kea DHCP is not yet complete. pfSense end users do not view ISC DHCP as a separate product or feature. My suggestion is that pfSense hold off on advertising ISC DHCP as deprecated until after the pfSense development team believes that the integration is feature complete and all of the transitional issues have been exposed. Once the pfSense integration is declared stable; then begin issuing "deprecation warnings" to push administrators to switch over.

To assist in finding outstanding issues I suggest that any state which is generated by ISC DHCP or Kea DHCP be wiped when administrators switch between the two implementations. For example, any DNS entries created for static or temporary DHCP leases should be removed. Otherwise, if Kea DHCP doesn't support the generation of DNS entries the administrator won't discover there is a problem until the DHCP configuration changes. At that point chasing down why a DNS entry wasn't created or why a DNS entry for the wrong address exists will be quite painful.

Thanks for listening even if you disagree with my point of view.